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Akfix

Akfix 840 Fire Block Spray Foam (1x12 Oz.)- Orange Color Fire Retardant Polyurethane Expanding Foam for Gap Filling, Insulation and Sealing on Window and Door, Fire Rated, Paintable | 12 Oz. 1 Pack

  • Based on 373 reviews
Condition: New
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Availability: In Stock.
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Arrives Saturday, Sep 27
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Size: 1 Pack


Style: Fire Block 12oz


Features

  • High Expansion for Wide Gap Filling: Effectively expands to fill large gaps and cavities, ensuring excellent coverage with minimal product use. Perfect for sealing around door and window frames, electrical fixtures, pipe inlets, and wall penetrations.
  • Strong Bonding to Various Surfaces: Delivers superior adhesion to materials like wood, concrete, metal, and more for lasting results.
  • Paintable Finish for Outdoor Durability: Once cured, the foam can be painted or coated to enhance UV resistance and blend seamlessly with surroundings.
  • Class-A Fire Rated for Enhanced Safety: Akfix Fire Block offers superior fire resistance with a Class A fire rating, ensuring safer residential, commercial, and industrial applications. This UL-certified and ICC-approved product delivers enhanced protection and reliable performance across a wide range of environments.

Brand: Akfix


Material: Polyurethane Foam


Compatible Material: Building and Construction Materials


Item Form: Spray


Color: Orange


Package Dimensions ‏ : ‎ 7.91 x 5.12 x 2.95 inches; 15.2 ounces


Item model number ‏ : ‎ 840


Date First Available ‏ : ‎ April 1, 2024


Manufacturer ‏ : ‎ Akfix


Best Sellers Rank: #6,838 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #20 in Urethane Adhesives


#20 in Urethane Adhesives:


Customer Reviews: 4.2 4.2 out of 5 stars 373 ratings


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Sep 27

This item is non-returnable:

Non-returnable. Transportation of this item is subject to hazardous materials regulation

View our full returns policy here.

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Top Amazon Reviews

    • Works well! although a bit expensive
I used it on a small/medium (2-4 foot high with 3 tiers) waterfall. It was barely enough for one. A professional would have used it with more efficiency i'm sure. WEAR GLOVES! If it's stuck on your fingers and nails, then a nail filer will help with the nails. Nothing but time will help with your fingers. ... show more
Reviewed in the United States on May 20, 2025 by Kenneth Lee
    • WORKS!
Amazing! Every can worked! It doesn't expand too much at all, which is exactly what I needed. It dries hard and sticks to everything - so be careful not to get it on you. Amazing deal, actually, as regular foam at the hardware store costs between 6 and ten dollars a can, and if you want black foam, like for fountains, etc, you are going to pay over $20 a can! Now, I am familiar with foam in cans. I know how to keep the foam from dripping, during application. It's a skill. The foam has to make contact with the receiving surface and if you are fighting gravity, you have to layer small beads. This is true for just about any foam spray. This was amazing and perfect and I'm in love! ... show more
Reviewed in the United States on November 23, 2024 by Matthew Kennedy
    • Wear gloves, it's messy but it works!
Great! Much easier than other options. My recommendations: Spray down from inside if you're sealing an RV floor. It's challenging to spray up., wear gloves (it's near impossible to get this off your hands), and wear a mask if your sensitive to things like spray paint - it smells but it's not as strong as other spray foams I've used in my house and the odor was gone after an afternoon. ... show more
Reviewed in the United States on June 27, 2025 by Beach Dude
    • Good buy
Gap filler works great
Reviewed in the United States on June 11, 2025 by Jennifer Emerick
    • Does not hold
Horrible stuff. It is hard to use. It just fell off off everything I sprayed it on. Didn't stay in seams. Most of it is on the ground, not in my wall seam
Reviewed in the United States on July 21, 2025 by Ang
    • Matches OEM foam on travel trailer underbelly
Had to replace waste valve on my travel trailer… had to open up my “sealed underbelly. Used this foam to seal underbelly after valve change out. Worked fine and closely matched OEM foam I disturbed and had to remove. NOTICE: you will most likely use both cans!There is a learning curve to applying the foam! Haha! Was a bit messy as I was laying on my back and shooting it in tight places.It wants to drip and drool!🤨 wear clothes u can throw away! Wear disposable gloves! Sticks to you and everything else! Drys reasonably fast. Similar to spray foam cans available in big box stores. However, none carry black color! I you want the OEM look… this works! I ended up using 4 cans total. Your job and skills may differ. Happy with results on my end. ... show more
Reviewed in the United States on June 5, 2025 by Brenda K
    • Quick and easy
Got sprayed in form insulation in my attic need to patch a place that got damaged this worked great for that. Can does not go very far so get an extra. Very easy to apply for do it yourself.
Reviewed in the United States on July 8, 2025 by brandi barnes
    • Expanding Foam
It works great. But you have to use up the whole can as the nozzle and hose plugs up after use. I had over 1/2 a can left over that I had to throw away because of that.
Reviewed in the United States on July 2, 2025 by Alan Leggett

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